package math;

public class Demo1 {
	public static void mian(String[] args) {
		
		int i = 1;
		int j = i++ + i++ + i++ + i++;
		System.out.println(j);
		int year = 2000;
		boolean isLeapYear = (year % 4 == 0 && year % 100 != 0)||(year%400==0);
		System.out.println(isLeapYear);

	}

}
